
Oscillating tools are great, but not magical
Make sure you go sloooooowly. Let the tool do ALL of the work. Don't push on it to force it to go more quickly.
Also, figure out how to brace the tool so it's traveling straight. You can very easily make a complete hash out of whatever you're working on.
Finally, get the right blade for the job. Each type has a different material it will cut.
Regards,
-scott
Welcome to Rivendell, Mr. Anderson.